Answers

Add 81/16 and 3/20

1^st number: 5 1/16, 2^nd number: 3/20

81/16 + 3/20 is 417/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 20 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 16 × 5 = 80,
   81/16 = 81 × 5/16 × 5 = 405/80
3. Likewise, for the 2nd fraction, since 20 × 4 = 80,
   3/20 = 3 × 4/20 × 4 = 12/80
4. Add the two like fractions:
   405/80 + 12/80 = 405 + 12/80 = 417/80
5. So, 81/16 + 3/20 = 417/80
   In mixed form: 517/80

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